I couldn't find anything with the search function, and I never got a reply on my formal bug report, so I'll make a thread here to see if anyone else is having this trouble.

For months now, the Twitch sidebar in the MacOS version of Opera GX has been broken. Originally, it would continue to badge the icon with the correct number of streamers online, but clicking the icon to reveal the list would only show who was online at the moment Opera GX was last launched. This persisted for several months until more recent updates have broken it entirely. Now it shows no one online–neither in the list nor the badge–no matter if they are or not. At least a dozen version updates have passed since this began, so I don't know why it's still happening. I also have no idea how to log out of my connected Twitch account in Opera (as a form of troubleshooting), since there aren't any buttons to do so.